Hand brake for railway cars



sept. 25,1923.

. S. B. HASELTINE` HAND BRAKE Fon RAILWAY oAns Filed Maya, 1922 BatentedSept. 25, 1923.

UNTED STATES l please@ 'fr ortica.

PATE

STACY B. HASELTINE, OF CHICAGO ILLINOIS, ASSIGNOR TO VILLIAM H. MINER, OY, CRAZY, NEW YORK.

HAND enana ron RAILWAY cAns.

Application filed May 8,V

.To @ZZ w from. t may concern:

Be it known that I, STACY B. IIAsnL'riNn, a citizen of the UnitedStates, residing at. Chicago, in the county of Cook and State ofIllinois, have invented a certain new and useful Improvement in I-IandBrakes forV Railway Cars, of which the following is a full, clear,concise, and exact description,

reference being had to the accompanying drawings, fication. y

This invention relates to improvements in hand brakes for railway cars.

One object of the invention is to provide an efficient hand brakemechanism of the ratcheting type and more particularly one in whichengagement between the pawl and ratchet wheel is always made quicklywithout possibility of undue lost motion or shortening of the powerstroke of the operating handle.

Another object of the invention is to provide an arrangement for holdingthe winding member against accidental reverse rotation, whicharrangement includes a holding dog or latch adapted to be released bythe same operating handle which is employed in applying the brake incombination with efficient means to prevent such release accidentally atany time during the application of the brakes.

Other objects of the invent-ion Vwill more clearly appear from thedescription and claims hereinafter following.

In the drawing forming apart of this specification, Figure 1 is avertical, sectional view of an improved vhand brake shown applied to theend wall of a car, the section corresponding substantially to thesection line 1 1 of Figure 3. Figure 2 is a similar vertical, sectioncorresponding to the section line 2-2 of Figure 3. Figure 3 is avertical, sectional view taken perpendicular to the car wallsubstantially diametrically of the mechanism and corresponding to theline 3-3 of Figure 1. And Figure 4l is a horizontal, sectional viewcorresponding to the line 4-4- of Figure 1 illustrating certain details,parts being broken away. j

In said drawing, the end wall of the car is indicated at l() and towhich Lthe improved mechanism is adopted to be secured. They improvedmechanism includes a main outer forming a partv of this specishell orcasing designated generally by the 1922. Serial No. 559,187.

reference character A,the same being of cylindrical form having anintegral outer end wall 11 and securing [langes 12-12 at its inner endby which it is riveted to the wall. The vcasing A. is provided at thebottom thereof with a longitudinally extending opening 13 to permitentrance of the chain and also to allow for the back and forth movementsof theoperating handle. At its inner end, thecasing is formed with apartial segmental shaped wall 111 of appreciably less than half ofthearea of the casing, theV remainder of the back wall being completed by aseparate lmember 15 so shaped as to complete the back wall, said member15 preferably having beveled edges 16-16engaging with ,correspondingbeveled edges on the casing ,sothatthe member 15 will lie flush with theback wall 14- when the casing is attached to the car wall. j Y

The outer end wall 11 of the casing is formed with an inwardly extendingintegral stud 17 and an opposing oppositely. extending stud *18 isformed on the member 15,' as clearly shown in Figure 3. A journal vforthe winding drum is provided by a tubular elementl) which fits over thetwo studs 17 and 18 and is preferably riveted to the stud 18 as by therivet 20. rIn this manner-it will be noted that I obtain van elongatedjournal thus providing the maximum length of bearing surface for therotatable chain winding drum B.

The drum B has a main winding section proper 21 with an annular flange22 at its inner end and a partition-forming flange 23 at the oppositeend of the winding section 21. On oneY side and preferably adjacent thepartition. flange 23, the drum- B. is formed with an integral lug2lb-notched as indicated at 25 to pro-vide a hook for the end link 26 ofthe chain running to the usual sheave wheel at the bottom ofthe car. Thehook-Shaped lug 24 is so positioned that the link 2G may be hookedthereover before the drum is telescoped over the tubular bearing 19 andwhen assembled with the latter the link 26 is locked in position asclearly shown in Figure 3. It will benoted that the partition flange 23,in effect, divides the casing Figure L3, the drum member B is providedwith `a circular bearing 27 relatively narrow. To the right of thebearing 27, the

drum member Bis formed Vwith diametrically disposed urved keying lugs23---28 as shown in Figure l and over which is assembled the ratchetwheel 29, thus interlocking the latter with the drum member B so thatthey rotate simultaneously. To the right of the key lugs 28, as viewedin Figure 3, the

' drum member B is provided with an addieration of a brake mechanism,inasmuch asV it minimizes Athe possible lost motion inV tional bearing30 of lesser diameter than the bearing 27.

The bearings 27 and 30 support a carrier or fulcruin member C, thelatter having spaced side walls 31-31 with journal bearing openingstherein corresponding to the bearings 27 Vand 30 and an arcuateconnecting web 32 between the flanges3l. Pivotally supported on thecarrier C is a pawl D, as by means ofthe rivet33.v Said pawl. D

Y is provided with a tooth 34 normally out of Yengagement with butadaptedl to engage the peripheral teeth Vof the ratchet wheel 29, asclearly indicated in Figure l. @n theopposite'side of the pivot 33 tothe tooth 34, the pawl Dy is formed with a curved tail-piece 35 havingan OG curved surface 36, as shown lin Figure l.

The carrier C is formed with a pair-of radially extending ears orflanges 37-37 between which ispivotally mounted as by the rivet 38, ltheoperating handle or lever E. The-latter is formedfwith a curvedprojection or finger 39 of suitable contour to cooperate with the OGcurved surface 36 of the pawl D. 'With this arrangement, when theoperating` handle E is pulled toward the left, as viewed in Figure l,thelug or finger 39'will swing the tail-piece 35 of the pawl D andthrow-the tooth of the latter into engagement with theratchet'wlieel.`Aeswill be clear from an inspection of Figure l, a very slight angular`movement of the handle E on its pivot will produce a greater andtherefore quicker angular movement of the tooth 34 on account of therelatively short radius from the pivotof the pawl D to the point ofeffective engagement of the handle and tailpiece 35. This is ofimportance in the opeffecting operative engagement with the ratchet`wheel each time a power stroke isV 'tooth 42 adapted to engage with theratchet wheel as shown in Figure 1 and has a relatively heavyeXtension43 passing outwardly through an opening 44 in the casing A, the latterbeingv laterally offset at this point to form a hood or weather shieldfor the dog as indicated at 45 in Figure l. The heavy' extension 43 iscontinued downwardly with a tail-piece 46 having arounded lower caniedge 47. With the arrangementthus far described, it will be seen thatthe latch or dog F is gravity influenced to automatically engagerwiththe ratchet wheel. y

To disengagethe tooth 4,2 of the dog from the ratchet wheel,'theoperating handle E has a relatively heavy lug 4S extended toward thetail-piece of the dog F, said lug 48 having a curved surface 49 adaptedto engage the rounded edge 47 of the dog and, when the handle is swung asufficient distance counterclockfvise, as viewed in Figure l, willengage the dog F and swing .it so as to pull the tooth 42 away from theratchet wheel. In this connection, it will be :observed that l obtain arelatively'high leverage ratio in disengaging the dog from the ratchetwheel, which is of impor-tance in facilitating release of the brakerapidly and particularly where the brake chain has been rplaced under ahigh tension and'undercut teeth areremployed on the ratchet wheel, asshown in Figure l, since, during the release, the ratchet wheel must begiven slightamount of further rotation in a winding direction before thevdog `tooth can be disengaged. Y

In order to prevent accidental disengage- `ment of: the dog from theratchet wheel when the brakeman is using the handle E,.l provide thefollowing arrangement. .Pivotally supported between the end' wall Y11 ofthe casing and the inturnedilange 4lY previously referred to, as by'means of the rivet 50 shown in Figure 4, is'asector-like block l. Thelatter is provided with a 'laterally'extended finger piece or pin 52movable within an arcuate slot 53 formed in the end wall ll of thecasing, as shown best in Figures l' time the pin 52 is at Ythe lower endof the slot 53, the block acts as a limiting stopto movements of thepawl D` and consequently the carrier C in a counter-clocki'visedirection and thepparts are so Apositionedthat when the pawl and carrierD are thus stopped in their movements, the lug` 48eof the operatinghandle will not quite engage the tail-piece of the'dog VF, as shown inFigure l. When the brakeman desires to release the brakes, he swings thegravity block 51 to its other VeXtreme position as shown by the dottedlines in 'Figure l, thus permitting the operating handle and `carrier `Cand pawl D to swing farther in a counterclockwise direction andsufficiently for Vthe aiv lug 480i thehandle to engage the dog F and inturn disengage the latter from the ratchet wheel.

From the preceding description, it will be seenthat I provide Jfor quickengagement ot the operating pawl to effect winding; provide vforrelatively powerful leverage ratio to effect disengagement oi'thelocking dog from the ratchet wheel; and alsol employ only oneoperating lever or handle for effecting both the winding up of the brakechain and the release thereof. In addition, the arrangement alsoprevents accidental release as previously described.

I have herein shown and described what I now consider the preferred'manner of carrying out the invention, but the same is merelyillustrative and Iv contemplate all changes and modifications that comewithin the scope or" the claims appended hereto.

I claim:

l. In a hand brake for cars and the like, the combination with arotatable member;

of a ratchet wheel rotatable in unison therewith; a carrier oscillatablymounted with respect to said wheel; a pawl pivotally mounted on saidcarrier and cooperable with said ratchet wheel; an operating handlemounted on said carrier for movement relative thereto and cooperablewith said pawl to move it to operative position; and locking means forpreventing rotation of said member accidentally in an unwindingdirection.

2. In a hand brake for cars and the like, the combination with arotatable member; of a ratchet wheel rotatable in unison therewith; acarrier oscillatably mounted with respect to said whe'el; a pawlpivotally mounted on said carrier and cooperable with said ratchetwheel; an operating handle pivoted on said carrier at a different pointand cooperable with said pawl to move it to operative position; lockingmeans-'for preventing rotation of said member accidentally in anunwinding direction; and means on said handle cooperable with saidlocking means to render the latter inoperative when said handle is movedagainst said lockingr means.

3. In a'hand brake for cars and the like, the combination with arotatable member tor effecting tightening of the brake chain; ot aratchet wheel rotatable in unison therewith; a carrier oscillatable withrespect to said wheel; a pawl pivotally mounted on said carrier andprovided with a tooth cooperable with the ratchet wheel, said pawl beingprovided also on the opposite side of its pivot to that of the tooth,with a tail-piece; an operating handle pivotally mounted on said carrierat adifferent point and provided with means to engage said tail-piece ofthe pawl and throw the latter into operative relation with the ratchetwheel; and locking means for preventing accidental rotation of saidmember in a reverse direction.

1- In a hand brake for cars and the like,

mounted on said carrier at a different point l and provided with meansto engage saidV tail-piece of the pawl to throw the latter intooperative relation with the ratchet wheel; locking means for preventingaccidental rotation of said member in a reverse direction; and means onsaid handle cooperable with said lockingmeans to render the latterinoperative when the handle is swung kinto engagement with saidlocking'means.

5. Ina hand brake of thecharacter described, the combination with arotatableA member for effecting tightening of the brake chain; ofratchet mechanism for et'- ecting step by step rotation of said member,said mechanism including` an operating Ihandle movable in one directionto actuate the mechanism; locking means toprevent accidental rotation ofsaid member in an unwinding direction; cooperable means on said handleand locking means to render the latter inoperative when said handle ismoved in a direction opposite to that necessary to actuate saidmechanism; and a shiftable safety device adapted to prevent cooperativerelation between said locking means and means on the handle cooperabletherewith. f 6. In a hand brake of the character described, thecombination with a member for efecting tightening of the brake chain; ofratcheting mechanism for effecting step by step rotation of said member,said mechanism including an operating handle movable in one direction toactuate the mechanism; locking means including` a pivoted dog to preventrotation of said member accidentally in an unwinding direction; means onsaid handle engageable with said dog to move the latter to inoperativeposition, when the handle is moved in a direction opposite to thatnecessary to actuate said mechanism; and an adjustable safety deviceadapted to prevent or permit cooperative engagement between said dog andsaid means on said handle cooperable therewith.

7. In a hand brake of the character described, the combination with arotatable chain winding drum; of ratcheting means for effecting step bystep rotation of said drum and including a bodily movable and pivotallymounted operating handle; means for locking said drum against rotationin Van unwinding direction and including a pivotally mounted dog'.having a tail-piece; an extension on said operating handle adapted toengage said tail-piece of thedog to move the latter to inoperativeposition when the handle is moved in one direction; and a manuallyadjustable safety element adapted to prevent or permit cooperativerelation between said extension on the handle and tail-pieceot the dog'.

8. In a handbrake of the character described, the combination With acasing .of generally cylindrical 'form having an integral outer end Walland adapted to beY secured at its innervend to a Wall of a car; oii abearing extending` axially of said casing` tlierewithin; a Winding;`drum member .rotatably mountedon said bearing` and having a Windingportion proper; a ratchet Wheel rigidly secured to said drum member; acarn rier oscillatably mounted .on said `drum member andstraddling' saidratchet wheel; an operating handle pivotally mounted on said carrier; apawl pivotallymounted on said carrier at a different lpoint and areranged to cooperate With said ratchet Wheel,

.said pawl and handle having cooperable engaging .sections to actuatevthe paWl .to :operative position When the handle is pulled in `onedirection; a lockinggravity actuated dog pivotally mounted on saidcasing and cooperable with said ratchet Wheel tojprevent rotation of`the latter and drum in Aan unwinding direction, said dog having atailpiece; an extension on saidhandle adapted to engage said`tail-,piece to disengage the latterl from the ratchet Wheel when lthehandle is moved in ta direction opposite to l*that first mentioned; anda block lpivotally mounted on said casingat :a point intermediatethedogandthe operating handle, said block 1n onetposition preventing`engagement betweenthe handle and the dog' and, in another position,permitting` Asuch engagement. In Witness that I claim the 'foregoinghavehereunto subscribed my name this 18th day of April 1922. i '1 sTAoYVB. HirsELTiNn. Y

lVitnesSeS n CARRIE GAILNG, ANN BAKER.

